usb: gadget: renesas_usbhs: support otg pin control

some renesas_usbhs device is supporting OTG external device interface.
In that device, it is necessary to control PWEN/EXTLP on DVSTCTR.
This patch support it.
But renesas_usbhs driver doesn't have OTG support for now.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

arch/arm/mach-shmobile/board-mackerel.c

@@ -808,6 +808,7 @@ static struct usbhs_private usbhs1_private = {
 		},
 		.driver_param = {
 			.buswait_bwait	= 4,
+			.has_otg	= 1,
 			.pipe_type	= usbhs1_pipe_cfg,
 			.pipe_size	= ARRAY_SIZE(usbhs1_pipe_cfg),
 		},

drivers/usb/renesas_usbhs/common.c

@@ -114,6 +114,10 @@ void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
 {
 	u16 mask = DCFM | DRPD | DPRPU;
 	u16 val  = DCFM | DRPD;
+	int has_otg = usbhs_get_dparam(priv, has_otg);
+
+	if (has_otg)
+		usbhs_bset(priv, DVSTCTR, (EXTLP | PWEN), (EXTLP | PWEN));
 
 	/*
 	 * if enable

include/linux/usb/renesas_usbhs.h

@@ -136,6 +136,11 @@ struct renesas_usbhs_driver_param {
 	 * pio <--> dma border.
 	 */
 	int pio_dma_border; /* default is 64byte */
+
+	/*
+	 * option:
+	 */
+	u32 has_otg:1; /* for controlling PWEN/EXTLP */
 };
 
 /*